PT-2026-33439 · Nomios Poland · Greenmod

Marcin Ressel · Published 2026-04-17 · Updated 2026-04-17 · CVE-2026-5131

NVD

CVSS v4.0

6.9

Medium

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

GREENmod uses named pipes for communication between plugins, the web portal, and the system service, but the access control lists for these pipes are configured incorrectly. This allows an attacker to communicate with the stream and upload any XML or JSON file, which will be processed by the named pipe with the privileges of the user under whose context the service is running. This allows for Server-Side Request Forgery to any Windows system on which the agent is installed and which provides communication via SMB or WebDav.

This issue was fixed in version 2.8.33.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-5131

Affected Products

Greenmod

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-5131 · Security Note
• https://cert.pl/posts/2026/04/CVE-2026-5131 · Note
• https://nomios.pl/greenmod · Note